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Analysis of Characteristics of CFRP Composites Exposed Under High-Temperature and High-Humidity Environment for a Long Period

고온 다습한 환경에 장기간 노출된 CFRP 복합재료의 특성 분석

  • Hong, Suk-Woo (Dept. of Mechanical Engineering, SungKyunKwan Univ.) ;
  • Ahn, Sang-Soo (Dept. of Mechanical Engineering, SungKyunKwan Univ.) ;
  • Koo, Jae-Mean (Dept. of Mechanical Engineering, SungKyunKwan Univ.) ;
  • Seok, Chang-Sung (Dept. of Mechanical Engineering, SungKyunKwan Univ.)
  • 홍석우 (성균관대학교 기계공학부) ;
  • 안상수 (성균관대학교 기계공학부) ;
  • 구재민 (성균관대학교 기계공학부) ;
  • 석창성 (성균관대학교 기계공학부)
  • Received : 2012.02.13
  • Accepted : 2012.06.13
  • Published : 2012.08.01

Abstract

Carbon fiber reinforced plastic (CFRP) composites have high specific stiffness and high specific strength. Therefore, they are increasingly being use, instead of conventional metallic materials in the aviation and automobile industries, where there is a strong demand for lightweight materials. In aircraft, the fuselage is exposed to severe conditions of high temperatures and high humidity. Therefore, it is necessary to estimate the strength of CFRP composites under real conditions from the viewpoint of aircraft safety. In this study, CFRP specimens were immersed in distilled water at $75^{\circ}C$ for a long time. Then, tensile tests were performed on these specimens, and the fracture characteristics of the fractured surfaces were analyzed using SEM. A fatigue test was performed on specimens immersed for 300 days with R=0.1, and it was confirmed that the fatigue life deteriorated in immersed specimens compared to specimens that were not immersed.

Keywords

CFRP Composite;High Temperature and Humidity Environment;Tensile Strength;Fatigue Life;Distilled Water

Acknowledgement

Supported by : 한국연구재단

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  3. Utilization of Finite Element Analysis in Design and Performance Evaluation of CFRP Bicycle Frames vol.37, pp.1, 2013, https://doi.org/10.3795/KSME-A.2013.37.1.121